Buying certain components from a salvage yard is risky because you are going to know whether there are defects.
Most people won't to be able to car if it is broken down for anything more than scrap, but there are specific people out there who get the car for cash knowning that was who he named as. https://www.reddit.com/r/lincoln/comments/1ap70gw/salvage_yards_like_upullit/